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Which of the following gives a general idea of how the noise-killing system works? Besides its main use the noise-killing syste
Which of the following gives a general idea of how the noise-killing system works? Besides its main use the noise-killing syste
admin
2008-12-15
70
问题
Which of the following gives a general idea of how the noise-killing system works?
Besides its main use the noise-killing system can______.
选项
A、make a car lighter
B、make a car quieter
C、reduce the cost of a silencer
D、improve the performance of a silencer
答案
A
解析
通过文章第四段Another good thing about the use of noise-killing systems is that it saves the need for a silencer;this not only reduces the weight of a car...得知。
转载请注明原文地址:https://kaotiyun.com/show/rgNd777K
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